ROSACEAE 363 



4. Schizonotus Lindl. 

 1. S. sorbifolius (L.) Lindl. Cultivated in Eastern U. S. and 

 Canada, sometimes escaping. Native of N. Asia. 



A rare escape known definitely only from Conn, and N. Y. in our 

 area. 



5. Porteranthus Brit ton 



1. P. trifoliatus (L.) Britton. Woodlands: Ont. and N. Y. to 

 Mich., Mo. and Ga. 



N. Y. Rare in the Highlands of the Hudson. 

 N. J. Sussex, Warren, Hunterdon, Morris, Passaic and Bergen 



counties, increasing northward; locally at Prospertown, Ocean Co. 

 Pa. Monroe, Northampton, Bucks, Montgomery, Philadelphia, 



Delaware and Chester counties. 



Tertiary, o: Cretaceous, rare: Older Formations, scattered and 

 local, most common on limestone. 138-224 days. Sea level- 

 1,000 ft. 



6. Filipendula [Tourn.] Mill. 



1. F. rubra (Hill) B. L. Robinson. In moist ground: Vt. to Pa., 

 Iowa, Ky. and Ga. 



Reported only from Hancock, Delaware Co., N. Y., Andover, 

 Sussex Co., N. J., and locally in Conn., perhaps nowhere as a wild 

 plant. 



Filipendula Ulmaria (L.) Maxim, and F. Filipendula (L.) Voss, both commonly 

 cultivated, are rare escapes in our area. Neither is established. 



7. Potentilla L. 



Flowers axillary, solitary, on long pedicels. 



Pubescence of stem, petioles and peduncles appressed. 



Leaflets sparingly silky or strigose, toothed except at the 



very base. 1. P. simplex. 



Leaflets densely silky beneath; toothed only from the 



middle upwards. 2. P. pumila. 



Pubescence of the stem, petioles and peduncles spreading. 3. P. canadensis. 

 Flowers cymose. 



Cymes very leafy, many-flowered. 



Annuals or biennials; styles glandular at the base; 



scarcely exceeding the calyx. 4. P. monspeliensis. 



Perennials; styles not glandular; petals slightly exceeding 

 the calyx. 

 Leaves white tomentose beneath. 5. P. argentea. 



Leaves not white tomentose beneath. 6. P. intermedia. 



Cymes not very leafy, generally rather few flowered. 



Petals deep yellow, scarcely longer than the sepals. 7. P. recta. 



Petals sulphur yellow, half longer than the sepals. 8. P. sulphurea. 



